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Atmospheric transport and deposition of microplastics in a remote mountain catchment
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Researchers documented atmospheric deposition of microplastic fragments, films, and fibers in a remote, pristine mountain catchment in the French Pyrenees, with particles traveling up to 95 km through the air. This landmark study confirmed that microplastics reach even the most isolated terrestrial environments through wind transport, meaning no ecosystem on Earth is truly free from plastic contamination.
Plastic litter is an ever-increasing global issue and one of this generation’s key environmental challenges. Microplastics have reached oceans via river transport on a global scale. With the exception of two megacities, Paris (France) and Dongguan (China), there is a lack of information on atmospheric microplastic deposition or transport. Here we present the observations of atmospheric microplastic deposition in a remote, pristine mountain catchment (French Pyrenees). We analysed samples, taken over five months, that represent atmospheric wet and dry deposition and identified fibres up to ~750 µm long and fragments ≤300 µm as microplastics. We document relative daily counts of 249 fragments, 73 films and 44 fibres per square metre that deposited on the catchment. An air mass trajectory analysis shows microplastic transport through the atmosphere over a distance of up to 95 km. We suggest that microplastics can reach and affect remote, sparsely inhabited areas through atmospheric transport. Microplastics can reach and affect regions far from where they are released because of atmospheric transport, suggest analyses of atmospheric deposition in a remote, pristine mountain catchment in France.
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This is a published correction to a study on atmospheric transport and deposition of microplastics in a remote mountain catchment, adding missing acknowledgments and fixing an incorrect reference. The underlying finding—that microplastics travel through the atmosphere to reach pristine remote environments—remains unchanged and significant.
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